Tamil Calendar
Astronomy Relevant to Astrology by v.P. Jain
varahamihira
Land Pollution
Tithi Calculations
Great ancient indians
Great Ancient Indians
Trigonometry
Shocking Scientific Inventions by Ancient Saints!
TRIGONOMETRIC FUNCTIONS OF ACUTE ANGLES By M. Jaya krishna Reddy Mentor in mathematics, APIIIT-Basar, Adilabad(dt),A.P. India.
